Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
  • F16D23/12—Mechanical clutch-actuating mechanisms arranged outside the clutch as such
  • F16D23/14—Clutch-actuating sleeves or bearings; Actuating members directly connected to clutch-actuating sleeves or bearings
  • F16D23/143—Arrangements or details for the connection between the release bearing and the diaphragm
  • F16D23/144—With a disengaging thrust-ring distinct from the release bearing, and secured to the diaphragm
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
  • F16D23/12—Mechanical clutch-actuating mechanisms arranged outside the clutch as such
  • F16D23/14—Clutch-actuating sleeves or bearings; Actuating members directly connected to clutch-actuating sleeves or bearings
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
  • F16C23/06—Ball or roller bearings
  • F16C23/08—Ball or roller bearings self-adjusting
  • F16C23/082—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface
  • F16C23/084—Ball or roller bearings self-adjusting by means of at least one substantially spherical surface sliding on a complementary spherical surface
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
  • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
  • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
  • F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
  • F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C2361/00—Apparatus or articles in engineering in general
  • F16C2361/43—Clutches, e.g. disengaging bearing

Definitions

• the invention relates to a release bearing for a shift clutch used in motor vehicles.
• the roller bearing which is designed as an inclined shoulder bearing, comprises a bearing ring arranged in a torsionally rigid manner and a circumferential bearing ring, between which the roller bodies used in a cage are guided.
• a bearing ring is provided with a contact zone designed as a spherical cap segment, which is supported on a complementary spherical cap segment of an adjusting ring, thereby ensuring that the release bearing can be pivoted relative to the adjusting ring.
• the setting ring can be assigned to both the rotating bearing ring and the torsionally rigid bearing ring.
• Self-adjusting or self-adjusting release bearings are used to compensate for a production-related axial runout of the shifting clutch or its plate spring. This measure reduces wear and thus improves the life of the release bearing.
• the release bearing is part of a release device and is axially displaceable together with a housing on a guide sleeve.
• the axial displacement takes place via a release lever or a central release, the release movement using a clutch pedals or automated can be initiated by a clutch actuator.
• the design of the release bearing provides that both the circumferential bearing ring and the torsionally rigid bearing ring are supported via a ring base on a plate spring or indirectly or directly on the housing.
• the axial stop which is caused in particular by the disc springs and is transferred to the thrust bearing, leads to clutch jerking of the shifting clutch and thus to a loss of comfort.
• the self-adjusting or self-adjusting release bearing compensates for the axially parallel offset, avoids clutch jerking or disadvantageous vibrations and improves overall comfort.
• DE 72 45 141 U shows a release bearing in which an adjusting ring is provided between the plate spring or the spring tongues of the disconnect clutch and the inner ring of the release bearing.
• the contact zone between the adjusting ring and the inner ring is designed to be complementary spherical, as a result of which the directly supporting components can shift or align with one another.
• the setting ring and the inner ring are made of the same materials. This measure favors a disadvantageous formation of friction rust in the contact zone of both components, which increases wear and at the same time causes a disadvantageous noise development.
• the object of the present invention is to realize a self-adjusting release bearing with a wear-resistant and low-friction contact zone between the components that can be pivoted against each other, a bearing ring and the adjusting ring.
• This problem is solved by using a sliding element which is made of a thermoplastic.
• This material has a high temperature cycling and an improved crack resistance compared to previous materials. Furthermore, this material is low-friction and, due to the hardness or strength, sufficiently wear-resistant, which results in an increased service life that corresponds to the service life of the internal combustion engine.
• thermoplastics such as polyaryl ether ketones (PAEK) are preferably used as the thermoplastic.
• PAEK polyaryl ether ketones
• thermoplastic materials can be provided with additives to influence the material properties.
• additives which increase the friction, wear and strength or have a positive influence, optimize the thermoplastic materials, which are therefore preferably used for the production of a sliding element for a self-adjusting release bearing.
• thermoplastic materials in connection with the aforementioned additives are characterized by good processability and a cost advantage.
• this material can be easily combined with an adjusting ring or bearing ring made of steel.
• a range of 0.5 to 6 mm is provided as the wall thickness for the sliding element.
• PA 46 CF 30 / PTFE 5 / H is provided as the preferred material for producing the sliding element according to the invention.
• the combination of the thermoplastic with carbon fibers as an additive and polytetraflu- Ethylene as a solid lubricant is an ideal combination to optimize friction and wear in order to achieve the required increased service life.
• the sliding element made of a thermoplastic material can be assigned to both the setting ring and the bearing ring.
• an advantageous embodiment of the invention provides that the sliding element is sprayed directly onto the adjusting ring or the corresponding bearing ring as a covering.
• the support surface is advisable to provide the support surface with, for example, a circumferential groove which, during injection molding, is filled with the material of the sliding element, which provides an effective fixation and thus a permanent connection between the two components.
• An injection molding process is preferably used to produce the sliding element.
• the shrinkage stresses that occur during injection molding can be controlled according to the invention by providing the carrier surface of the inner ring or the adjusting ring with, for example, an axially parallel or helical notch groove that is filled with the material of the sliding element during injection molding. At the same time, this measure provides effective protection against rotation between the sliding element and the bearing ring or the adjusting ring.
• the invention also includes a non-positive fastening of the sliding element, for which purpose, in particular, gluing the sliding element to the support surface of the bearing ring or the adjusting ring is appropriate.
• a suitable high-temperature adhesive is preferably used for this.
• the gluing of the sliding element further ensures that even small unevenness between the support surface of the adjusting ring or the bearing ring and the sliding element is compensated for, and thus cavities are avoided which have a disadvantageous effect on the fixing or the mode of operation of the components which can be pivoted relative to one another.
• this component is thus positively attached to a bearing ring of the release bearing or the adjusting ring.
• a bearing ring designed as a covering it makes sense to provide the bearing ring or the adjusting ring as a reinforcement, which is enclosed in some areas by the material of the sliding element.
• the invention includes a sliding element designed as a separate component.
• This sliding element which is preferably also produced by an injection molding process from a thermoplastic, is preferably non-positively attached to the carrier surface of the bearing ring or the adjusting ring by means of an adhesive.
• FIG. 1 shows a half-section of a release bearing according to the invention in connection with a release device in which the sliding element assigned to the adjusting ring is supported on the circumferential inner bearing ring;
• Figure 2 shows a release bearing, the torsionally rigid inner
• Bearing ring is arranged pivotably to the setting ring
• FIG. 3 shows a release bearing, the circumferential outer bearing ring is enclosed by the sliding element, on the outside of which an adjusting ring is pivotally supported.
• FIG. 1 shows the release device 1a, consisting of a housing 2a, a release bearing 3a and an adjusting ring 4a.
• the housing 2a In an installed position, the housing 2a is guided on a guide sleeve, which concentrically surrounds a drive shaft 5, which connects an internal combustion engine to a manual transmission.
• a fork or a rocker arm of an actuating element 7 engages, which is connected via a cable or an actuator to a clutch pedal in the passenger compartment of the vehicle.
• the outer ring 9a of the release bearing 3a is supported with an annular base 8.
• a holding plate 10 is inserted between the ring base 8 and the rim 6, which is U-shaped on the inside, engages around the ring base 8 on the inside and forms a flange 11 at the end facing away from the rim 6.
• a plate spring 12 is provided, which is supported between the flange 11 and the ring base 8.
• An annular gap 39 which arises in the radial direction between the holding plate 10 and the ring base 8 enables the release bearing 3a to be self-adjusted relative to the housing 2a.
• the release bearing 3a designed as an inclined shoulder bearing is provided with a torsionally rigid outer ring 9a and a circumferential inner ring 13a, between which rolling elements 14 are guided in a cage 15.
• the adjusting ring 4a On the side facing away from the rolling elements 14, the adjusting ring 4a is supported on the inner ring 13a, on the ring flange 16 of which a plate spring 17 assigned to the shifting clutch or its spring tongues rest non-positively on the end face.
• a sliding element 19a is provided in a contact zone 18a between the components made of steel, the inner ring 13a and the adjusting ring 4a.
• the directly supported components, the inner ring 13a and the setting ring 4a each form complementarily arranged spherical cap segments 20a, 21a.
• the sliding on the setting ring 4a element 19a extends from the ring flange 16 over the entire length of a receptacle 22 of the adjusting ring 4a and likewise also forms a spherical cap segment, ie a convex section which rests non-positively on the concave shaped counter surface of the inner ring 13a.
• the sliding element 19a is preferably non-positively attached to the setting ring 4a by gluing. Alternatively, such a sliding element 19a can also be sprayed directly onto the receptacle 22 of the adjusting ring 4a as a covering.
• the sliding element 19a is provided with a plurality of circumferentially distributed cams 23 which positively engage in corresponding recesses 24 in the ring flange 16.
• the sliding element 19a is provided in the area of the receptacle 22 with fixing pins 25 which engage in grooves 26 or recesses.
• the contact zone 18a extends at an angle, "".
• the spherical cap segments 20a, 21a are designed in the shape of a radius, identified by "R".
• FIG. 2 shows the release bearing 3b in connection with the release device 1b. Thereafter, the release bearing 3b is provided with a circumferential outer ring 9b and a torsionally rigid inner ring 13b, between which rolling elements 14 inserted in a cage 15 are guided.
• the release bearing 3b is arranged between a plate spring 12, which is connected to the shifting clutch, which is not shown in FIG. 2, and an adjusting ring 4b, which also cooperates with a pre-pressure spring, which is also not shown in FIG.
• the setting ring 4b is associated with a holding element 28, on the flange 29 of which a compression spring, not shown, is supported.
• the holding element 29 is positioned on an axially displaceable crimp ring 30 which, in the installed state, is connected to a piston which slides on a guide sleeve, which in turn concentrically concentrates a drive shaft 5 (as shown in FIG. 1) connecting the internal combustion engine to the manual transmission encloses.
• the inner ring 13b is supported on a sliding element 19b assigned to the adjusting ring 4b via a flange 31 which is oriented obliquely inwards. At least in the contact zone 18b Between the flange 31 of the inner ring 13b and the adjusting ring 4b, these mutually supported components form spherical cap segments 20b, 21b.
• the sliding element 19b is shaped to match the shape of the spherical cap segments 20b, 21b.
• the setting ring 4b can be flattened, the associated sliding element 19b being designed on the outside as a spherical cap segment 20b.
• a pressure ring 32 is supported on the flange 31 on the opposite side from the contact zone 18b.
• the flange 31 as well as the pressure ring 32 also forms spherical cap segments 34, 35 in a contact area 33.
• the plate spring 37 is supported on an end face 36 of the pressure ring 32, which is on the inside on a flange 38 of the flare ring 30 is fixed.
• the release bearing 3c is shown in half section, provided with the torsionally rigid inner ring 13c and the circumferential outer ring 9c, between which the rolling elements 14 are inserted in the cage 15.
• the outer ring 9c is enclosed on the outside by the sliding element 19c, on which in turn the adjusting ring 4c is supported.
• the adjusting ring 4c and the sliding element 19c are correspondingly provided with spherical cap segments 20c, 21c in a contact zone 18c.
• the plate spring 17 of the shifting clutch is supported on the largely disc-like setting ring 4c, which is shown in a neutral position, which corresponds to the hatched position, and in both extreme positions, ie in which the setting ring 4c is pivoted to the sliding element 19c.
• Ring base 26 Groove a Outer ring 27 Symmetry axis b Outer ring 28 Holding element c Outer ring 29 Flange 0 Holding plate 30 Flare ring 1 Flare 31 Flange 2 Disc spring 32 Pressure ring 3a Inner ring 33 Contact area 3b Inner ring 34 Ball segment segment 3c Inner ring 35 Ball segment segment 4 Rolling elements 36 End face 5 Cage 37 Disc spring 6 Ring flange 38 Bord 7 disc spring 39 annular gap 8a contact zone 8b contact zone 8c contact zone

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Mechanical Operated Clutches (AREA)
• Support Of The Bearing (AREA)
• Paper (AREA)
• Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
• Seal Device For Vehicle (AREA)
• Rolling Contact Bearings (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

Family

ID=7685544

Family Applications (1)

Country Status (9)

Families Citing this family (28)

Citations (6)

Family Cites Families (10)

• 2001
  • 2001-05-18 DE DE10124663A patent/DE10124663A1/de not_active Ceased
• 2002
  • 2002-04-13 WO PCT/EP2002/004123 patent/WO2002095250A1/de active IP Right Grant
  • 2002-04-13 JP JP2002591685A patent/JP2004522105A/ja active Pending
  • 2002-04-13 EP EP02730156A patent/EP1387965B1/de not_active Revoked
  • 2002-04-13 KR KR1020037000573A patent/KR100851262B1/ko not_active IP Right Cessation
  • 2002-04-13 DE DE50211635T patent/DE50211635D1/de not_active Expired - Lifetime
  • 2002-04-13 CN CN02801724A patent/CN1463336A/zh active Pending
  • 2002-04-13 AT AT02730156T patent/ATE385296T1/de not_active IP Right Cessation
  • 2002-04-13 BR BRPI0205281-4A patent/BR0205281B1/pt not_active IP Right Cessation
• 2003
  • 2003-11-14 US US10/714,306 patent/US6843354B2/en not_active Expired - Lifetime

Patent Citations (6)

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